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On the 2.2 zafira, z22se engine. There is no MAF sensor. Which is why you can not find it.Instead it uses a combination of the IAT (Intake Air Temp) and the MAP (Manifold Air Pressure) sensors.The IAT is the small plastic sensor on the side of the intake duct.The MAP sensor is just after the throttle body. You need to take the whole throttle body off to get at it.

3 possible problems your mass are flow meter/senso could be going bad but not bad enough to register a fault, the same for your idle air valve and also your throttle position sensor. all 3 of these are on your throttle body .
with the engine running tap the side of the mass air flow with the back of a screw driver, if the engine sputers mass air flow needs replaced.you can try cleaning it with some mass air flow cleaner if you cant find that at your auto parts store get some electrical parts wash. your idle air valve needs to be cleaned or replaced there hard to get off. your throttle position sensor , you need to know the setting ,if the auto parts store cant give you aprint out of instuctions best to let a kia dealership do it and pay out the ****.

The air temperature is taken between the air filter and the throttle body. Look in the roof of your air cleaner box. (usually 2-pin plug) After the air cleaner, the tube that sends the air to the throttle body has the mass air flow sensor in it.(usually 4-pin plug)

Typically the Mass Air Flow sensor, if that's what your needing, is located in the air intake system, between the throttle body, or throttle plate, and the air filter. some are a single sensor, others are a unit type that have the intake hoses hooked to either side of them and have a honeycomb inside. There are some that have them in the Throttle plate assembly aswell.

98 jeep grand cherokee MAF
It located in the throttle-body. Look for electrical wires connected to it. It has an electrical resistor in the air flow stream that is kept cool based on the air flowing over it. The more air flow, the more electricity needed to maintain the resistors temperature. That's how it measures air flow.